/* * libOPNMIDI is a free MIDI to WAV conversion library with OPN2 (YM2612) emulation * * MIDI parser and player (Original code from ADLMIDI): Copyright (c) 2010-2014 Joel Yliluoma * OPNMIDI Library and YM2612 support: Copyright (c) 2017-2018 Vitaly Novichkov * * Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation: * http://iki.fi/bisqwit/source/adlmidi.html * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #ifndef OPNMIDI_H #define OPNMIDI_H #ifdef __cplusplus extern "C" { #endif #define OPNMIDI_VERSION_MAJOR 1 #define OPNMIDI_VERSION_MINOR 4 #define OPNMIDI_VERSION_PATCHLEVEL 0 #define OPNMIDI_TOSTR_I(s) #s #define OPNMIDI_TOSTR(s) OPNMIDI_TOSTR_I(s) #define OPNMIDI_VERSION \ OPNMIDI_TOSTR(OPNMIDI_VERSION_MAJOR) "." \ OPNMIDI_TOSTR(OPNMIDI_VERSION_MINOR) "." \ OPNMIDI_TOSTR(OPNMIDI_VERSION_PATCHLEVEL) #include #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) #include typedef uint8_t OPN2_UInt8; typedef uint16_t OPN2_UInt16; typedef int8_t OPN2_SInt8; typedef int16_t OPN2_SInt16; #else typedef unsigned char OPN2_UInt8; typedef unsigned short OPN2_UInt16; typedef char OPN2_SInt8; typedef short OPN2_SInt16; #endif /* == Deprecated function markers == */ #if defined(_MSC_VER) /* MSVC */ # if _MSC_VER >= 1500 /* MSVC 2008 */ /*! Indicates that the following function is deprecated. */ # define OPNMIDI_DEPRECATED(message) __declspec(deprecated(message)) # endif #endif /* defined(_MSC_VER) */ #ifdef __clang__ # if __has_extension(attribute_deprecated_with_message) # define OPNMIDI_DEPRECATED(message) __attribute__((deprecated(message))) # endif #elif defined __GNUC__ /* not clang (gcc comes later since clang emulates gcc) */ # if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)) # define OPNMIDI_DEPRECATED(message) __attribute__((deprecated(message))) # elif (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) # define OPNMIDI_DEPRECATED(message) __attribute__((__deprecated__)) # endif /* GNUC version */ #endif /* __clang__ || __GNUC__ */ #if !defined(OPNMIDI_DEPRECATED) # define OPNMIDI_DEPRECATED(message) #endif /* if !defined(OPNMIDI_DEPRECATED) */ #ifdef OPNMIDI_BUILD # ifndef OPNMIDI_DECLSPEC # if defined (_WIN32) && defined(OPNMIDI_BUILD_DLL) # define OPNMIDI_DECLSPEC __declspec(dllexport) # else # define OPNMIDI_DECLSPEC # endif # endif #else # define OPNMIDI_DECLSPEC #endif /** * @brief Volume scaling models */ enum OPNMIDI_VolumeModels { /*! Automatical choice by the specific bank */ OPNMIDI_VolumeModel_AUTO = 0, /*! Linearized scaling model, most standard */ OPNMIDI_VolumeModel_Generic, /*! Native OPN2's logarithmic volume scale */ OPNMIDI_VolumeModel_NativeOPN2, /*! Logarithmic volume scale, using volume map table. Used in DMX. */ OPNMIDI_VolumeModel_DMX, /*! Logarithmic volume scale, used in Apogee Sound System. */ OPNMIDI_VolumeModel_APOGEE, /*! Aproximated and shorted volume map table. Similar to general, but has less granularity. */ OPNMIDI_VolumeModel_9X }; /** * @brief Sound output format */ enum OPNMIDI_SampleType { /*! signed PCM 16-bit */ OPNMIDI_SampleType_S16 = 0, /*! signed PCM 8-bit */ OPNMIDI_SampleType_S8, /*! float 32-bit */ OPNMIDI_SampleType_F32, /*! float 64-bit */ OPNMIDI_SampleType_F64, /*! signed PCM 24-bit */ OPNMIDI_SampleType_S24, /*! signed PCM 32-bit */ OPNMIDI_SampleType_S32, /*! unsigned PCM 8-bit */ OPNMIDI_SampleType_U8, /*! unsigned PCM 16-bit */ OPNMIDI_SampleType_U16, /*! unsigned PCM 24-bit */ OPNMIDI_SampleType_U24, /*! unsigned PCM 32-bit */ OPNMIDI_SampleType_U32, /*! Count of available sample format types */ OPNMIDI_SampleType_Count, }; /** * @brief Sound output format context */ struct OPNMIDI_AudioFormat { /*! type of sample */ enum OPNMIDI_SampleType type; /*! size in bytes of the storage type */ unsigned containerSize; /*! distance in bytes between consecutive samples */ unsigned sampleOffset; }; /** * @brief Instance of the library */ struct OPN2_MIDIPlayer { /*! Private context descriptor */ void *opn2_midiPlayer; }; /* DEPRECATED */ #define opn2_setNumCards opn2_setNumChips /** * @brief Sets number of emulated chips (from 1 to 100). Emulation of multiple chips extends polyphony limits * @param device Instance of the library * @param numChips Count of virtual chips to emulate * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_setNumChips(struct OPN2_MIDIPlayer *device, int numCards); /** * @brief Get current number of emulated chips * @param device Instance of the library * @return Count of working chip emulators */ extern OPNMIDI_DECLSPEC int opn2_getNumChips(struct OPN2_MIDIPlayer *device); /** * @brief Get obtained number of emulated chips * @param device Instance of the library * @return Count of working chip emulators */ extern OPNMIDI_DECLSPEC int opn2_getNumChipsObtained(struct OPN2_MIDIPlayer *device); /** * @brief Reference to dynamic bank */ typedef struct OPN2_Bank { void *pointer[3]; } OPN2_Bank; /** * @brief Identifier of dynamic bank */ typedef struct OPN2_BankId { /*! 0 if bank is melodic set, or 1 if bank is a percussion set */ OPN2_UInt8 percussive; /*! Assign to MSB bank number */ OPN2_UInt8 msb; /*! Assign to LSB bank number */ OPN2_UInt8 lsb; } OPN2_BankId; /** * @brief Flags for dynamic bank access */ enum OPN2_BankAccessFlags { /*! create bank, allocating memory as needed */ OPNMIDI_Bank_Create = 1, /*! create bank, never allocating memory */ OPNMIDI_Bank_CreateRt = 1|2 }; typedef struct OPN2_Instrument OPN2_Instrument; /* ======== Setup ======== */ #ifdef OPNMIDI_UNSTABLE_API /** * @brief Preallocates a minimum number of bank slots. Returns the actual capacity * @param device Instance of the library * @param banks Count of bank slots to pre-allocate. * @return actual capacity of reserved bank slots. */ extern OPNMIDI_DECLSPEC int opn2_reserveBanks(struct OPN2_MIDIPlayer *device, unsigned banks); /** * @brief Gets the bank designated by the identifier, optionally creating if it does not exist * @param device Instance of the library * @param id Identifier of dynamic bank * @param flags Flags for dynamic bank access (OPN2_BankAccessFlags) * @param bank Reference to dynamic bank * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_getBank(struct OPN2_MIDIPlayer *device, const OPN2_BankId *id, int flags, OPN2_Bank *bank); /** * @brief Gets the identifier of a bank * @param device Instance of the library * @param bank Reference to dynamic bank. * @param id Identifier of dynamic bank * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_getBankId(struct OPN2_MIDIPlayer *device, const OPN2_Bank *bank, OPN2_BankId *id); /** * @brief Removes a bank * @param device Instance of the library * @param bank Reference to dynamic bank * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_removeBank(struct OPN2_MIDIPlayer *device, OPN2_Bank *bank); /** * @brief Gets the first bank * @param device Instance of the library * @param bank Reference to dynamic bank * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_getFirstBank(struct OPN2_MIDIPlayer *device, OPN2_Bank *bank); /** * @brief Iterates to the next bank * @param device Instance of the library * @param bank Reference to dynamic bank * @return 0 on success, <0 when any error has occurred or end has been reached. */ extern OPNMIDI_DECLSPEC int opn2_getNextBank(struct OPN2_MIDIPlayer *device, OPN2_Bank *bank); /** * @brief Gets the nth intrument in the bank [0..127] * @param device Instance of the library * @param bank Reference to dynamic bank * @param index Index of the instrument * @param ins Instrument entry * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_getInstrument(struct OPN2_MIDIPlayer *device, const OPN2_Bank *bank, unsigned index, OPN2_Instrument *ins); /** * @brief Sets the nth intrument in the bank [0..127] * @param device Instance of the library * @param bank Reference to dynamic bank * @param index Index of the instrument * @param ins Instrument structure pointer * @return 0 on success, <0 when any error has occurred * * This function allows to override an instrument on the fly */ extern OPNMIDI_DECLSPEC int opn2_setInstrument(struct OPN2_MIDIPlayer *device, OPN2_Bank *bank, unsigned index, const OPN2_Instrument *ins); #endif /* OPNMIDI_UNSTABLE_API */ /*Override Enable(1) or Disable(0) LFO. -1 - use bank default state*/ extern OPNMIDI_DECLSPEC void opn2_setLfoEnabled(struct OPN2_MIDIPlayer *device, int lfoEnable); /*Get the LFO state*/ extern OPNMIDI_DECLSPEC int opn2_getLfoEnabled(struct OPN2_MIDIPlayer *device); /*Override LFO frequency. -1 - use bank default state*/ extern OPNMIDI_DECLSPEC void opn2_setLfoFrequency(struct OPN2_MIDIPlayer *device, int lfoFrequency); /*Get the LFO frequency*/ extern OPNMIDI_DECLSPEC int opn2_getLfoFrequency(struct OPN2_MIDIPlayer *device); /** * @brief Override Enable(1) or Disable(0) scaling of modulator volumes. -1 - use bank default scaling of modulator volumes * @param device Instance of the library * @param smod 0 - disabled, 1 - enabled */ extern OPNMIDI_DECLSPEC void opn2_setScaleModulators(struct OPN2_MIDIPlayer *device, int smod); /** * @brief Enable(1) or Disable(0) full-range brightness (MIDI CC74 used in XG music to filter result sounding) scaling * * By default, brightness affects sound between 0 and 64. * When this option is enabled, the brightness will use full range from 0 up to 127. * * @param device Instance of the library * @param fr_brightness 0 - disabled, 1 - enabled */ extern OPNMIDI_DECLSPEC void opn2_setFullRangeBrightness(struct OPN2_MIDIPlayer *device, int fr_brightness); /** * @brief Enable or disable built-in loop (built-in loop supports 'loopStart' and 'loopEnd' tags to loop specific part) * @param device Instance of the library * @param loopEn 0 - disabled, 1 - enabled */ extern OPNMIDI_DECLSPEC void opn2_setLoopEnabled(struct OPN2_MIDIPlayer *device, int loopEn); /** * @brief Enable or disable soft panning with chip emulators * @param device Instance of the library * @param softPanEn 0 - disabled, 1 - enabled */ extern OPNMIDI_DECLSPEC void opn2_setSoftPanEnabled(struct OPN2_MIDIPlayer *device, int softPanEn); /** * @brief [DEPRECATED] Enable or disable Logarithmic volume changer * * This function is deprecated. Suggested replacement: `opn2_setVolumeRangeModel` with `OPNMIDI_VolumeModel_NativeOPN2` volume model value; */ OPNMIDI_DEPRECATED("Use `opn2_setVolumeRangeModel(device, OPNMIDI_VolumeModel_NativeOPN2)` instead") extern OPNMIDI_DECLSPEC void opn2_setLogarithmicVolumes(struct OPN2_MIDIPlayer *device, int logvol); /** * @brief Set different volume range model * @param device Instance of the library * @param volumeModel Volume model type (#OPNMIDI_VolumeModels) */ extern OPNMIDI_DECLSPEC void opn2_setVolumeRangeModel(struct OPN2_MIDIPlayer *device, int volumeModel); /** * @brief Get the volume range model * @param device Instance of the library * @return volume model on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_getVolumeRangeModel(struct OPN2_MIDIPlayer *device); /** * @brief Load WOPN bank file from File System * * Is recommended to call adl_reset() to apply changes to already-loaded file player or real-time. * * @param device Instance of the library * @param filePath Absolute or relative path to the WOPL bank file. UTF8 encoding is required, even on Windows. * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_openBankFile(struct OPN2_MIDIPlayer *device, const char *filePath); /** * @brief Load WOPN bank file from memory data * * Is recommended to call adl_reset() to apply changes to already-loaded file player or real-time. * * @param device Instance of the library * @param mem Pointer to memory block where is raw data of WOPL bank file is stored * @param size Size of given memory block * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_openBankData(struct OPN2_MIDIPlayer *device, const void *mem, long size); /** * @brief [DEPRECATED] Dummy function * * This function is deprecated. Suggested replacement: `opn2_chipEmulatorName` * * @return A string that contains a notice to use `opn2_chipEmulatorName` instead of this function. */ OPNMIDI_DEPRECATED("Use `adl_chipEmulatorName(device)` instead") extern OPNMIDI_DECLSPEC const char *opn2_emulatorName(); /** * @brief Returns chip emulator name string * @param device Instance of the library * @return Understandable name of current OPN2 emulator */ extern OPNMIDI_DECLSPEC const char *opn2_chipEmulatorName(struct OPN2_MIDIPlayer *device); /** * @brief List of available OPN2 emulators */ enum Opn2_Emulator { /*! Mame YM2612 */ OPNMIDI_EMU_MAME = 0, /*! Nuked OPN2 */ OPNMIDI_EMU_NUKED, /*! GENS */ OPNMIDI_EMU_GENS, /*! Genesis Plus GX (a fork of Mame YM2612) */ OPNMIDI_EMU_GX, /*! Count instrument on the level */ OPNMIDI_EMU_end }; /** * @brief Switch the emulation core * @param device Instance of the library * @param emulator Type of emulator (#Opn2_Emulator) * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_switchEmulator(struct OPN2_MIDIPlayer *device, int emulator); /** * @brief Library version context */ typedef struct { OPN2_UInt16 major; OPN2_UInt16 minor; OPN2_UInt16 patch; } OPN2_Version; /** * @brief Run emulator with PCM rate to reduce CPU usage on slow devices. * * May decrease sounding accuracy on some chip emulators. * * @param device Instance of the library * @param enabled 0 - disabled, 1 - enabled * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_setRunAtPcmRate(struct OPN2_MIDIPlayer *device, int enabled); /** * @brief Set 4-bit device identifier. Used by the SysEx processor. * @param device Instance of the library * @param id 4-bit device identifier * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_setDeviceIdentifier(struct OPN2_MIDIPlayer *device, unsigned id); /** * @section Information */ /** * @brief Returns string which contains a version number * @return String which contains a version of the library */ extern OPNMIDI_DECLSPEC const char *opn2_linkedLibraryVersion(); /** * @brief Returns structure which contains a version number of library * @return Library version context structure which contains version number of the library */ extern OPNMIDI_DECLSPEC const OPN2_Version *opn2_linkedVersion(); /** * @brief Returns string which contains last error message of initialization * * Don't use this function to get info on any function except of `opn2_init`! * Use `opn2_errorInfo()` to get error information while workflow * * @return String with error message related to library initialization */ extern OPNMIDI_DECLSPEC const char *opn2_errorString(); /** * @brief Returns string which contains last error message on specific device * @param device Instance of the library * @return String with error message related to last function call returned non-zero value. */ extern OPNMIDI_DECLSPEC const char *opn2_errorInfo(struct OPN2_MIDIPlayer *device); /* ======== Initialization ======== */ /** * @brief Initialize OPNMIDI Player device * * Tip 1: You can initialize multiple instances and run them in parallel * Tip 2: Library is NOT thread-safe, therefore don't use same instance in different threads or use mutexes * Tip 3: Changing of sample rate on the fly is not supported. Re-create the instance again. * * @param sample_rate Output sample rate * @return Instance of the library. If NULL was returned, check the `adl_errorString` message for more info. */ extern OPNMIDI_DECLSPEC struct OPN2_MIDIPlayer *opn2_init(long sample_rate); /** * @brief Close and delete OPNMIDI device * @param device Instance of the library */ extern OPNMIDI_DECLSPEC void opn2_close(struct OPN2_MIDIPlayer *device); /* ======== MIDI Sequencer ======== */ /** * @brief Load MIDI (or any other supported format) file from File System * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param filePath Absolute or relative path to the music file. UTF8 encoding is required, even on Windows. * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_openFile(struct OPN2_MIDIPlayer *device, const char *filePath); /** * @brief Load MIDI (or any other supported format) file from memory data * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param mem Pointer to memory block where is raw data of music file is stored * @param size Size of given memory block * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_openData(struct OPN2_MIDIPlayer *device, const void *mem, unsigned long size); /** * @brief Resets MIDI player (per-channel setup) into initial state * @param device Instance of the library */ extern OPNMIDI_DECLSPEC void opn2_reset(struct OPN2_MIDIPlayer *device); /** * @brief Get total time length of current song * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @return Total song length in seconds */ extern OPNMIDI_DECLSPEC double opn2_totalTimeLength(struct OPN2_MIDIPlayer *device); /** * @brief Get loop start time if presented. * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @return Time position in seconds of loop start point, or -1 when file has no loop points */ extern OPNMIDI_DECLSPEC double opn2_loopStartTime(struct OPN2_MIDIPlayer *device); /** * @brief Get loop endtime if presented. * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @return Time position in seconds of loop end point, or -1 when file has no loop points */ extern OPNMIDI_DECLSPEC double opn2_loopEndTime(struct OPN2_MIDIPlayer *device); /** * @brief Get current time position in seconds * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @return Current time position in seconds */ extern OPNMIDI_DECLSPEC double opn2_positionTell(struct OPN2_MIDIPlayer *device); /** * @brief Jump to absolute time position in seconds * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param seconds Destination time position in seconds to seek */ extern OPNMIDI_DECLSPEC void opn2_positionSeek(struct OPN2_MIDIPlayer *device, double seconds); /** * @brief Reset MIDI track position to begin * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library */ extern OPNMIDI_DECLSPEC void opn2_positionRewind(struct OPN2_MIDIPlayer *device); /** * @brief Set tempo multiplier * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param tempo Tempo multiplier value: 1.0 - original tempo, >1 - play faster, <1 - play slower */ extern OPNMIDI_DECLSPEC void opn2_setTempo(struct OPN2_MIDIPlayer *device, double tempo); /** * @brief Returns 1 if music position has reached end * @param device Instance of the library * @return 1 when end of sing has been reached, otherwise, 0 will be returned. <0 is returned on any error */ extern OPNMIDI_DECLSPEC int opn2_atEnd(struct OPN2_MIDIPlayer *device); /** * @brief Returns the number of tracks of the current sequence * @param device Instance of the library * @return Count of tracks in the current sequence */ extern OPNMIDI_DECLSPEC size_t opn2_trackCount(struct OPN2_MIDIPlayer *device); /* ======== Meta-Tags ======== */ /** * @brief Returns string which contains a music title * @param device Instance of the library * @return A string that contains music title */ extern OPNMIDI_DECLSPEC const char *opn2_metaMusicTitle(struct OPN2_MIDIPlayer *device); /** * @brief Returns string which contains a copyright string* * @param device Instance of the library * @return A string that contains copyright notice, otherwise NULL */ extern OPNMIDI_DECLSPEC const char *opn2_metaMusicCopyright(struct OPN2_MIDIPlayer *device); /** * @brief Returns count of available track titles * * NOTE: There are CAN'T be associated with channel in any of event or note hooks * * @param device Instance of the library * @return Count of available MIDI tracks, otherwise NULL */ extern OPNMIDI_DECLSPEC size_t opn2_metaTrackTitleCount(struct OPN2_MIDIPlayer *device); /** * @brief Get track title by index * @param device Instance of the library * @param index Index of the track to retreive the title * @return A string that contains track title, otherwise NULL. */ extern OPNMIDI_DECLSPEC const char *opn2_metaTrackTitle(struct OPN2_MIDIPlayer *device, size_t index); /** * @brief MIDI Marker structure */ struct Opn2_MarkerEntry { /*! MIDI Marker title */ const char *label; /*! Absolute time position of the marker in seconds */ double pos_time; /*! Absolute time position of the marker in MIDI ticks */ unsigned long pos_ticks; }; /** * @brief Returns count of available markers * @param device Instance of the library * @return Count of available MIDI markers */ extern OPNMIDI_DECLSPEC size_t opn2_metaMarkerCount(struct OPN2_MIDIPlayer *device); /** * @brief Returns the marker entry * @param device Instance of the library * @param index Index of the marker to retreive it. * @return MIDI Marker description structure. */ extern OPNMIDI_DECLSPEC struct Opn2_MarkerEntry opn2_metaMarker(struct OPN2_MIDIPlayer *device, size_t index); /* ======== Audio output Generation ======== */ /** * @brief Generate PCM signed 16-bit stereo audio output and iterate MIDI timers * * Use this function when you are playing MIDI file loaded by `adl_openFile` or by `adl_openData` * with using of built-in MIDI sequencer. * * Don't use count of frames, use instead count of samples. One frame is two samples. * So, for example, if you want to take 10 frames, you must to request amount of 20 samples! * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param sampleCount Count of samples (not frames!) * @param out Pointer to output with 16-bit stereo PCM output * @return Count of given samples, otherwise, 0 or when catching an error while playing */ extern OPNMIDI_DECLSPEC int opn2_play(struct OPN2_MIDIPlayer *device, int sampleCount, short *out); /** * @brief Generate PCM stereo audio output in sample format declared by given context and iterate MIDI timers * * Use this function when you are playing MIDI file loaded by `adl_openFile` or by `adl_openData` * with using of built-in MIDI sequencer. * * Don't use count of frames, use instead count of samples. One frame is two samples. * So, for example, if you want to take 10 frames, you must to request amount of 20 samples! * * Available when library is built with built-in MIDI Sequencer support. * * @param device Instance of the library * @param sampleCount Count of samples (not frames!) * @param left Left channel buffer output (Must be casted into bytes array) * @param right Right channel buffer output (Must be casted into bytes array) * @param format Destination PCM format format context * @return Count of given samples, otherwise, 0 or when catching an error while playing */ extern OPNMIDI_DECLSPEC int opn2_playFormat(struct OPN2_MIDIPlayer *device, int sampleCount, OPN2_UInt8 *left, OPN2_UInt8 *right, const struct OPNMIDI_AudioFormat *format); /** * @brief Generate PCM signed 16-bit stereo audio output without iteration of MIDI timers * * Use this function when you are using library as Real-Time MIDI synthesizer or with * an external MIDI sequencer. You must to request the amount of samples which is equal * to the delta between of MIDI event rows. One MIDI row is a group of MIDI events * are having zero delta/delay between each other. When you are receiving events in * real time, request the minimal possible delay value. * * Don't use count of frames, use instead count of samples. One frame is two samples. * So, for example, if you want to take 10 frames, you must to request amount of 20 samples! * * @param device Instance of the library * @param sampleCount * @param out Pointer to output with 16-bit stereo PCM output * @return Count of given samples, otherwise, 0 or when catching an error while playing */ extern OPNMIDI_DECLSPEC int opn2_generate(struct OPN2_MIDIPlayer *device, int sampleCount, short *out); /** * @brief Generate PCM stereo audio output in sample format declared by given context without iteration of MIDI timers * * Use this function when you are using library as Real-Time MIDI synthesizer or with * an external MIDI sequencer. You must to request the amount of samples which is equal * to the delta between of MIDI event rows. One MIDI row is a group of MIDI events * are having zero delta/delay between each other. When you are receiving events in * real time, request the minimal possible delay value. * * Don't use count of frames, use instead count of samples. One frame is two samples. * So, for example, if you want to take 10 frames, you must to request amount of 20 samples! * * @param device Instance of the library * @param sampleCount * @param left Left channel buffer output (Must be casted into bytes array) * @param right Right channel buffer output (Must be casted into bytes array) * @param format Destination PCM format format context * @return Count of given samples, otherwise, 0 or when catching an error while playing */ extern OPNMIDI_DECLSPEC int opn2_generateFormat(struct OPN2_MIDIPlayer *device, int sampleCount, OPN2_UInt8 *left, OPN2_UInt8 *right, const struct OPNMIDI_AudioFormat *format); /** * @brief Periodic tick handler. * @param device * @param seconds seconds since last call * @param granularity don't expect intervals smaller than this, in seconds * @return desired number of seconds until next call * * Use it for Hardware OPL3 mode or when you want to process events differently from opn2_play() function. * DON'T USE IT TOGETHER WITH opn2_play()!!! */ extern OPNMIDI_DECLSPEC double opn2_tickEvents(struct OPN2_MIDIPlayer *device, double seconds, double granuality); /** * @brief Track options */ enum OPNMIDI_TrackOptions { /*! Enabled track */ OPNMIDI_TrackOption_On = 1, /*! Disabled track */ OPNMIDI_TrackOption_Off = 2, /*! Solo track */ OPNMIDI_TrackOption_Solo = 3, }; /** * @brief Sets options on a track of the current sequence * @param device Instance of the library * @param trackNumber Identifier of the designated track. * @return 0 on success, <0 when any error has occurred */ extern OPNMIDI_DECLSPEC int opn2_setTrackOptions(struct OPN2_MIDIPlayer *device, size_t trackNumber, unsigned trackOptions); /* ======== Real-Time MIDI ======== */ /** * @brief Force Off all notes on all channels * @param device Instance of the library */ extern OPNMIDI_DECLSPEC void opn2_panic(struct OPN2_MIDIPlayer *device); /** * @brief Reset states of all controllers on all MIDI channels * @param device Instance of the library */ extern OPNMIDI_DECLSPEC void opn2_rt_resetState(struct OPN2_MIDIPlayer *device); /** * @brief Turn specific MIDI note ON * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param note Note number to on [Between 0 and 127] * @param velocity Velocity level [Between 0 and 127] * @return 1 when note was successfully started, 0 when note was rejected by any reason. */ extern OPNMIDI_DECLSPEC int opn2_rt_noteOn(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 note, OPN2_UInt8 velocity); /** * @brief Turn specific MIDI note OFF * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param note Note number to off [Between 0 and 127] */ extern OPNMIDI_DECLSPEC void opn2_rt_noteOff(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 note); /** * @brief Set note after-touch * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param note Note number to affect by aftertouch event [Between 0 and 127] * @param atVal After-Touch value [Between 0 and 127] */ extern OPNMIDI_DECLSPEC void opn2_rt_noteAfterTouch(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 note, OPN2_UInt8 atVal); /** * @brief Set channel after-touch * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param atVal After-Touch level [Between 0 and 127] */ extern OPNMIDI_DECLSPEC void opn2_rt_channelAfterTouch(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 atVal); /** * @brief Apply controller change * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param type Type of the controller [Between 0 and 255] * @param value Value of the controller event [Between 0 and 127] */ extern OPNMIDI_DECLSPEC void opn2_rt_controllerChange(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 type, OPN2_UInt8 value); /** * @brief Apply patch change * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param patch Patch number [Between 0 and 127] */ extern OPNMIDI_DECLSPEC void opn2_rt_patchChange(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 patch); /** * @brief Apply pitch bend change * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param pitch 24-bit pitch bend value */ extern OPNMIDI_DECLSPEC void opn2_rt_pitchBend(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt16 pitch); /** * @brief Apply pitch bend change * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param msb MSB part of 24-bit pitch bend value * @param lsb LSB part of 24-bit pitch bend value */ extern OPNMIDI_DECLSPEC void opn2_rt_pitchBendML(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 msb, OPN2_UInt8 lsb); /** * @brief Change LSB of the bank number (Alias to CC-32 event) * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param lsb LSB value of the MIDI bank number */ extern OPNMIDI_DECLSPEC void opn2_rt_bankChangeLSB(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 lsb); /** * @brief Change MSB of the bank (Alias to CC-0 event) * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param msb MSB value of the MIDI bank number */ extern OPNMIDI_DECLSPEC void opn2_rt_bankChangeMSB(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_UInt8 msb); /** * @brief Change bank by absolute signed value * @param device Instance of the library * @param channel Target MIDI channel [Between 0 and 16] * @param bank Bank number as concoctated signed 16-bit value of MSB and LSB parts. */ extern OPNMIDI_DECLSPEC void opn2_rt_bankChange(struct OPN2_MIDIPlayer *device, OPN2_UInt8 channel, OPN2_SInt16 bank); /** * @brief Perform a system exclusive message * @param device Instance of the library * @param msg Raw SysEx message buffer (must begin with 0xF0 and end with 0xF7) * @param size Size of given SysEx message buffer * @return 1 when SysEx message was successfully processed, 0 when SysEx message was rejected by any reason */ extern OPNMIDI_DECLSPEC int opn2_rt_systemExclusive(struct OPN2_MIDIPlayer *device, const OPN2_UInt8 *msg, size_t size); /* ======== Hooks and debugging ======== */ /** * @brief Raw event callback * @param userdata Pointer to user data (usually, context of someting) * @param type MIDI event type * @param subtype MIDI event sub-type (special events only) * @param channel MIDI channel * @param data Raw event data * @param len Length of event data */ typedef void (*OPN2_RawEventHook)(void *userdata, OPN2_UInt8 type, OPN2_UInt8 subtype, OPN2_UInt8 channel, const OPN2_UInt8 *data, size_t len); /** * @brief Note on/off callback * @param userdata Pointer to user data (usually, context of someting) * @param adlchn Chip channel where note was played * @param note Note number [between 0 and 127] * @param pressure Velocity level, or -1 when it's note off event * @param bend Pitch bend offset value */ typedef void (*OPN2_NoteHook)(void *userdata, int adlchn, int note, int ins, int pressure, double bend); /** * @brief Debug messages callback * @param userdata Pointer to user data (usually, context of someting) * @param fmt Format strign output (in context of `printf()` standard function) */ typedef void (*OPN2_DebugMessageHook)(void *userdata, const char *fmt, ...); /** * @brief Set raw MIDI event hook * @param device Instance of the library * @param rawEventHook Pointer to the callback function which will be called on every MIDI event * @param userData Pointer to user data which will be passed through the callback. */ extern OPNMIDI_DECLSPEC void opn2_setRawEventHook(struct OPN2_MIDIPlayer *device, OPN2_RawEventHook rawEventHook, void *userData); /** * @brief Set note hook * @param device Instance of the library * @param noteHook Pointer to the callback function which will be called on every noteOn MIDI event * @param userData Pointer to user data which will be passed through the callback. */ extern OPNMIDI_DECLSPEC void opn2_setNoteHook(struct OPN2_MIDIPlayer *device, OPN2_NoteHook noteHook, void *userData); /** * @brief Set debug message hook * @param device Instance of the library * @param debugMessageHook Pointer to the callback function which will be called on every debug message * @param userData Pointer to user data which will be passed through the callback. */ extern OPNMIDI_DECLSPEC void opn2_setDebugMessageHook(struct OPN2_MIDIPlayer *device, OPN2_DebugMessageHook debugMessageHook, void *userData); /** * @brief Get a textual description of the channel state. For display only. * @param device Instance of the library * @param text Destination char buffer for channel usage state. Every entry is assigned to the chip channel. * @param attr Destination char buffer for additional attributes like MIDI channel number that uses this chip channel. * @param size Size of given buffers (both text and attr are must have same size!) * @return 0 on success, <0 when any error has occurred * * Every character in the `text` buffer means the type of usage: * ``` * `-` - channel is unused (free) * `+` - channel is used by regular voice * `@` - channel is used to play automatic arpeggio on chip channels overflow * ``` * * The `attr` field receives the MIDI channel from which the chip channel is used. * To get the valid MIDI channel you will need to apply the & 0x0F mask to every value. */ extern OPNMIDI_DECLSPEC int opn2_describeChannels(struct OPN2_MIDIPlayer *device, char *text, char *attr, size_t size); /* ======== Instrument structures ======== */ /** * @brief Version of the instrument data format */ enum { OPNMIDI_InstrumentVersion = 0 }; /** * @brief Instrument flags */ typedef enum OPN2_InstrumentFlags { OPNMIDI_Ins_Pseudo8op = 0x01, /*Reserved for future use, not implemented yet*/ OPNMIDI_Ins_IsBlank = 0x02 } OPN2_InstrumentFlags; /** * @brief Operator structure, part of Instrument structure */ typedef struct OPN2_Operator { /* Detune and frequency multiplication register data */ OPN2_UInt8 dtfm_30; /* Total level register data */ OPN2_UInt8 level_40; /* Rate scale and attack register data */ OPN2_UInt8 rsatk_50; /* Amplitude modulation enable and Decay-1 register data */ OPN2_UInt8 amdecay1_60; /* Decay-2 register data */ OPN2_UInt8 decay2_70; /* Sustain and Release register data */ OPN2_UInt8 susrel_80; /* SSG-EG register data */ OPN2_UInt8 ssgeg_90; } OPN2_Operator; /** * @brief Instrument structure */ typedef struct OPN2_Instrument { /*! Version of the instrument object */ int version; /* MIDI note key (half-tone) offset for an instrument (or a first voice in pseudo-4-op mode) */ OPN2_SInt16 note_offset; /* Reserved */ OPN2_SInt8 midi_velocity_offset; /* Percussion MIDI base tone number at which this drum will be played */ OPN2_UInt8 percussion_key_number; /* Instrument flags */ OPN2_UInt8 inst_flags; /* Feedback and Algorithm register data */ OPN2_UInt8 fbalg; /* LFO Sensitivity register data */ OPN2_UInt8 lfosens; /* Operators register data */ OPN2_Operator operators[4]; /* Millisecond delay of sounding while key is on */ OPN2_UInt16 delay_on_ms; /* Millisecond delay of sounding after key off */ OPN2_UInt16 delay_off_ms; } OPN2_Instrument; #ifdef __cplusplus } #endif #endif /* OPNMIDI_H */